The life of dry batteries, which are to be used in wet or damp places* may be considerably lengthened by being treated in the following manner:

The batteries are placed in glass jars a little wider and higher than themselves. A layer of dry sawdust is placed in the bottom, for the battery to rest on, and the sides are packed with sawdust to within 1/2 in. of the top. Waterproof wires are connected to the binding posts and melted paraffin poured over the battery to the top of the jar. The carbon and zinc terminals should be marked to avoid trouble when connecting several cells together. Batteries treated in this manner are waterproof and can be submerged in water if necessary. - Contributed by Olaf Tronnes, Evans-ton, Ill.